The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 1988
Filed:
Oct. 29, 1986
Frank C Bomba, Andover, MA (US);
Reinhard Schumann, Stow, MA (US);
Stephen R Jenkins, Acton, MA (US);
Paul Binder, Coral Springs, FL (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
A bus device is provided for use in a data processing system which includes a plurality of bus devices interconnected by a synchronous bus. The bus includes multiplexed data/address/arbitration lines which carry data, address, and arbitration information during respective data, command/address, and arbitration cycles. The bus also includes a BUSY line and a NO ARB line for controlling access to the data/address/arbitration lines. Where constructed as a memory device, the bus device includes memory circuits having a plurality of storage locations, and an interconnecting circuit which monitors the BUSY and NO ARB lines to identify various types of cycles on the bus, and which controls transmission of signals from the memory device over the bus in accordance with information derived by the monitoring means from the BUSY and NO ARB lines.